strangest glitch youve ever seen?

I just got the game a couple of days ago, so i havn't run into anything realy weird, but i pulled a gun on a guy and shot him. The sheriff was right there, then another guy with a gun shot at me. Then the sheriff turned and killed the guy who shot at me. It was hilarious. Also their was this woman on the train who was half way through a wall, and kept flying to the back in sittting position, then would reset at the front and fly back again.